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Titolo:
SYNTHESIS AND FUNCTIONALITIES OF POLY(N-VINYLALKYLAMIDE) .5. CONTROL OF A LOWER CRITICAL SOLUTION TEMPERATURE OF POLY(N-VINYLALKYLAMIDE)
Autore:
SUWA K; MORISHITA K; KISHIDA A; AKASHI M;
Indirizzi:
KAGOSHIMA UNIV,FAC ENGN,DEPT CHEM ENGN & APPL CHEM,1-21-40 KORIMOTO KAGOSHIMA 890 JAPAN KAGOSHIMA UNIV,FAC ENGN,DEPT CHEM ENGN & APPL CHEM KAGOSHIMA 890 JAPAN TERUMO CO LTD NAKAI KANAGAWA 25901 JAPAN
Titolo Testata:
Journal of polymer science. Part A, Polymer chemistry
fascicolo: 15, volume: 35, anno: 1997,
pagine: 3087 - 3094
SICI:
0887-624X(1997)35:15<3087:SAFOP.>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
N-SUBSTITUTED ACRYLAMIDES; PHASE-TRANSITION; RADICAL POLYMERIZATION; AQUEOUS-SOLUTIONS; POLY(N-ISOPROPYLACRYLAMIDE); ISOPROPYLACRYLAMIDE; COPOLYMERS;
Keywords:
N-VINYLISOBUTYRAMIDE; N-VINYLALKYLAMIDE; WATER-SOLUBLE POLYMERS; THERMOSENSITIVE PROPERTY; POLYN-ISOPROPYLACRYLAMIDE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
22
Recensione:
Indirizzi per estratti:
Citazione:
K. Suwa et al., "SYNTHESIS AND FUNCTIONALITIES OF POLY(N-VINYLALKYLAMIDE) .5. CONTROL OF A LOWER CRITICAL SOLUTION TEMPERATURE OF POLY(N-VINYLALKYLAMIDE)", Journal of polymer science. Part A, Polymer chemistry, 35(15), 1997, pp. 3087-3094

Abstract

N-vinyl-n -butyramide (NVBA), N-vinylisovaleramide (NVIVA), and N-vinyl-n-valeramide (NVVA), which are N-vinylalkylamides with different alkyl groups were synthesized and their solution behavior in a polymericform was examined. Copolymers of N-vinylisobutyramide (NVIBA) with N-vinylacetamide (NVA), NVIBA with NVVA, and NVVA with NVA were preparedby the solution polymerization to control the LCSTs. The resultant polyNVBA showed a lower critical solution temperature (LCST) sharply at 32 degrees C, but polyN-vinylisovaleramide (polyNVIVA) and polyN-vinyl-n-valeramide (polyNVVA) that have n-butyl and isobutyl groups, respectively, an their side chains were insoluble even in cold water. The water solubility of the resulting polymers was found to vary, depending on the molecular shapes as well as the side chain length of the alkyl groups in question. The copolymers consisting of NVVA, NVIBA, and NVA in water showed LCSTs sharply between 10 and 90 degrees C, depending on changes in their comonomer content. It was found that the changes inLCST that are caused by the incorporation of comonomers are due to changes in the overall hydrophilicity of the polymer. (C) 1997 John Wiley & Sons, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 12:25:22